鋁酸鋅螢光體之製程與特性研究

本研究是以溶膠-凝膠法製備鋁酸鋅掺鈦(ZnAl2O4:Ti)之螢光體，並探討鈦活化劑及熱處理條件對結構、微結構及發光特性之影響。 ZnAl2O4:Ti螢光體經300oC熱處理後可開始形成鋁酸鋅結晶，經300~1200oC熱處理後皆為正尖晶石結構，具有奈米晶型及奈米粒徑結構，經1000-1200oC熱處理後，呈介孔型微結構。摻雜鈦離子主要是呈Ti4+電子組態，可均勻分佈於鋁酸鋅結構。活化劑濃度對結晶特性無明顯影響，增加活化劑濃度及熱處理溫度皆會增加晶粒尺寸，也會導致吸收截止波長紅移。經紫外光激發後，螢光體於放射峰為435 nm處呈藍光放射帶。活化劑濃度、熱處理條件及晶格缺陷均會影響發光特性。

關鍵字

溶膠-凝膠法；鋁酸鋅；螢光體；藍光

並列摘要

In this study, ZnAl2O4:Ti phosphors were synthesized by the sol-gel method. The effects of activator and heat-treatment condition on the structure, microstructure and luminescence were investigated. The ZnAl2O4:Ti phosphors started to crystallize into zinc spinel phase after heating at 300oC. After heating at 300~1200oC, the phosphors had normal spinel structure with nanocrystalline and nanostructures. The prepared powders had mesopores micro structure after heating at 1000-1200oC. The activator had most Ti ions in the form of Ti4+ and was well-dispersion in zinc spinel structure. The concentration of activator did not affect the crystallize characterization. Increasing the activator concentration and heat-treatment temperature would result in coarsening of grain size and absorption edge wavelength red-shift. Under excitation of UV light, A blue emission band centered at 435 nm was observed. The luminescence characterization depended on the activator concentration, heat-treatment codition and lattice defect.

並列關鍵字

Sol-Gel ； ZnAl2O4 ； Phosphor ； Blue emission

參考文獻

[6] K. Mini Krishna, G. Anoop, M.K. Jayaraj, J. Electrochem. Soc. 154 (2007) 310.

[8] Y.C. Chiu, W.R. Liu, C.K. Chang, C.C. Liao, Y.T. Yeh, S.M. Jang, T.M. Chen, J. Mater. Chem. 20 (2010) 1755.

[16] T. Yamashita, K. Ueda, J. Solid. State. Chem., 180 (2007) 1410.

[23] H. Li, S. Yin, T. Sato, Nanoscale. Res. Lett. 6 (2011) 5.

[26] G. Lakshminarayana, L. Wondraczek, J. Solid. State. Chem. 184 (2011) 1931.

國際替代計量

鋁酸鋅螢光體之製程與特性研究

未授權

主題瀏覽